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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 
 
 

Differentiation of HL-60 promyelocytic leukemia cells monitored by flow cytometric measurement of nitro blue tetrazolium (NBT) reduction.

Reduction of nitro blue tetrazolium (NBT) to insoluble blue formazan granules occurs during the stimulus-induced respiratory burst of mature granulocytes and is routinely used as an indicator of the extent of granulocytic differentiation of HL-60 acute promyelocytic leukemia cells. In the present study, the differentiation of HL-60 leukemia cells induced by dimethylsulfoxide (DMSO) or retinoic acid was monitored by flow cytometric (FCM) measurement of forward and 90 degree light scatter of NBT treated cells. Two-parameter correlated analysis permitted a distinction between cells with increased forward and decreased 90 degree light scatter (NBT-), and cells with decreased forward and increased 90 degree light scatter (NBT+). Fixation of NBT treated cells with 1% paraformaldehyde facilitated flow cytometric analysis, and allowed differences in NBT reduction to be quantitated. DMSO-induced cells expressed an all-or-none reduction of NBT to formazan, compared with retinoic acid treated cells that exhibited a graded response. Three parameter flow cytometric analysis of HL-60 leukemia cells stained with propidium iodide in combination with NBT allowed the determination of the cell cycle distribution of NBT-treated cells.[1]

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